Spearmint
Fragrant leaves, repeat harvests, and a plant that is easy to multiply.
A lush, contained herb for drinks, cooking, and an attractive green balcony edge.
All growing guides01 / Grow it well
The practical care sheet.
Container
Give it its own draining pot, about 12–16 inches wide. Keep runners from rooting outside the pot.
Sunlight
Full sun to part shade. In very hot locations, afternoon shade can help the pot stay moist.
Watering
Keep the mix somewhat moist, never waterlogged. Check daily in hot or windy weather; water thoroughly when it begins to dry.
Feeding
Feed lightly during active growth. For outdoor container herbs, a half-strength liquid feed every 3–4 weeks is a useful starting point; follow the product label.
Pruning
Pinch leafy tips often for a full plant. Trim escaping runners and remove spent or damaged stems.
Propagation
Root healthy stem cuttings or divide a vigorous mature plant. Pot each new start separately and allow it to establish before sale.
Harvesting
Snip clean leafy tips above a leaf pair throughout active growth. Leave enough foliage for regrowth rather than stripping the pot.
Real maintenance
Expect frequent moisture checks and regular trimming. Roots can crowd a pot, so inspect and divide or repot when needed.
02 / Commercial test
Grow a batch. Learn the numbers.
- Established live plants, rooted starts, and clean fresh bunches where local food-sale rules allow.
- Take cuttings or divisions from a healthy mother plant, track how many root and survive, then move only established starts into sale pots.
- Count mother plant, pots, mix, cuttings that fail, water, feed, labels, packaging, labor, and any unsold bunches.
Gross margin = (sale price − unit cost) ÷ sale price × 100
Keep plant and harvest batches separate, include labor and losses, and test a real selling price. Check local food and plant-sale rules. No harvest, sale, or profit is guaranteed.
03 / Pet-aware setup
Keep curious pets in mind.
ASPCA classifies mint (Mentha spp.) as toxic to dogs. Large ingestions may cause vomiting and diarrhea. Keep spearmint inaccessible to pets.
Keep fertilizers and pest treatments inaccessible to pets, keep pets away during application, and follow product labels before allowing access. If a pet eats a plant or garden product and seems unwell, contact a veterinarian or animal poison service promptly.
ASPCA guidance on garden products